Answer:
A. is a group of firms acting together to limit output, raise the price, and increase economic profit
Explanation:
The cartel will exist in the oligopolistic market. It is the union of firms to set the market rules. The firms collude in the oligopolistic market, they do not compete. They cooperate and, cut market shares for each one based on geography, age, gender or any other factor.
The cartel fixes the product price and, the amount produced to achieve, the maximum gain possible.
It's not a free-market.